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Derivation of pdEquation

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Old   February 20, 2013, 19:19
Default Derivation of pdEquation
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Hello foamers. I have a pseudo-compressible solver, called lowMachFoam and it is actually a tad similar to buoyantFoam and I've been trying to understand how the pd equation (dynamic pressure that is) is derived. The equation has been attached. If anyone can point me to a journal paper or something, that would be immensely helpful. Thanks.
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